Ventilating device for a kitchen and a kitchen stove



Dec. 26, 1950 w. ApPLEDGER VENTILATING DEVICE FOR A KITCHEN AND A KITCHEN STOVE 5 Sheets-Sheet 1 Filed Sept. 3, 1946 INVENTOR. WILLIAM A. PLEDGER ATTORNEY Dec. 26, 1950 Filed Sept. 5, 1946 PLEDGER W. A. VENTILATING DEVICEv FOR A KITCHEN AND A KITCHEN STOVE 5 Sheets-Sheet. 2

INVENTOR. WILL/AM 4. P4500512 ATTORNEY Dec. 26, 1950 5 Sheets-Sheet 3 Filed Sept. 3, 1946 INVENTOR.

2% E s. M m P n A. M M m m r L A W. E w J Dec. 26, 1950' w. A. PLEDGER 2,535,363

VENTILATING DEVICE FOR A KITCHEN AND A KITCHEN STOVE Filed Sept. 3, 1946 5 Sheets-Sheet 4 INVENTOR.

W/LL/AM A. PLEDQEE ATTORNEY Dec. 26, 1950 w. A. PLEDGER VENTILATING DEVICE FOR A KITCHEN AND A KITCHEN STOVE V 5 Sheets-Sheet 5 Filed Sept. 5, 1946 P m. m4 M M ,L M w 5 ATTORNEY Patented Dec. 26, 1950 UNITED STATES PATENT OFFICE VENTILATIN G DEVICE FOR A KITCHEN AND A KITCHEN STOVE 5 Claims. 1

This invention relates to a ventilating device for a kitchen.

The object of this invention is to provide a device for eliminating of kitchen odors, products of combustion and hot air generated by a kitchen stove and for condensing grease and oil by means of filters out of the air drawn from said kitchen, so as to discharge into the atmosphere hot odorless air devoid of grease and oil.

Another object of this invention is to provide a device which is an improvement on the device described in my copending patent application Serial #620,035 filed October 3, 1945, now Patent 2,481,341, Sept. 6, 1949 on a ventilating device for a kitchen and a kitchen stove.

Another object of this invention is to provide an improved arrangement of various parts of the device whereby all grease and oil which settle on the filters, or inside walls of the device, are collected into a grease tank.

Another object of the invention is to provide a device of the type described having automatic dampers by which an open path for gases, hot air and fumes is maintained when the forced draft is unoperative.

Other objects and advantages will appear as the specification proceeds and the particular features of the invention will be specifically pointed out in the appended claims.

My invention is illustrated in the accompanying drawings in which Fig. 1 is a perspective view of the ventilating device;

Fig. 2 is a horizontal cross-section through the device taken along the line 22 of Fig. 3;

Fig. 3 is a central vertical cross-section through the device;

Fig. 4 is a central vertical cross-section through a modified form of the device showing a difierent flue;

Fig. 5 is a perspective view of a modified form of the device;

Fig. 6 is a vertical cross-section of the device shown in Fig. 5;

Fig. 7 is a perspective view of still another modification of the device;

Fig. 8 is a central vertical cross-section of the device shown in Fig. 7; and

Fig. 9 is a vertical cross-section of a modified form of the device adapted to serve two stoves arranged back to back.

Figs. 1 to 4 inclusive, show an adaptation of the ventilating device, generally indicated at I, to a gas range 2. The latter includes a cooking surface 3, an oven. 4, and a flue 5, extending T 2 back of the gas range 2 throughout the length thereof, which fiue guides the products of combustion, fumes and odors from said oven.

The ventilating device is preferably made out of sheet metal and comprises a chamber 6 arranged above the gas range 2 and consisting of a top 1, sidewalls 8 and 9, a front wall Ill having an opening I l in it which is closed by removable panels l2. The back of the device I is closed by a back wall l3, which extends considerably below the cooking surface 3. The back wall l3 has a flange M on each side thereof extending a certain distance at a right angle to said wall. The flanges l4 keep the back wall E3 of the device a certain distance away from the building wall near which the gas range 2 is set, thus minimizing fire hazard.

The panels l2 are secured in the opening H by a channel I5 attached to the lower rim of said panels which straddle the upper edge of the front wall It, and by locks [6 attached to the top of said panels.

The chamber 6 is divided by a plurality of filters 20 into a front compartment 2| and a rear compartment 22. The filters 20 may be of any construction and are shown here as consisting of several layers of a wire screen. Their function is to clean the air passing therethrough by condensing oil, grease, evaporations, and fumes contained in said air.

The filters 2|] are retained in the upper bracket 23 attached to the top I, and in the trough 24 which is arranged in the lowermost portion of said chamber 6, thus the filters 20 extend from the top of the chamber to the lowermost portion thereof. The filters 20 may be easily removed from their place and taken out of the device through the opening II for the purpose of cleaning or inspection.

Oil, grease and evaporations, condensed by said filters 20 out of the air, gradually find their way into the trough 24. The latter has a number of perforations 25 in the bottom thereof through which said condensates drop onto an inclined collector plate 26, and therefrom they flow into an inclined drain 28, under the lower end of which is a small removable grease tank 38 in which the condensates are collected.

The collector plate 26 extends between the side walls 8 and 9 and is of such width that it reaches under the front wall Ill and the trough A small portion of grease and oil may settle on the inner side of the panels I? and the front wall l 0, which grease and oil gradually find their way downwardly to the end of said wall and therecollected by the coliector plate 26 and directed v by the latter into the drain 28 from which the same are discharged into the tank 30.

An intake spout 33 is attached to the lower end of the front wall Ill. The spout 33 consists of a horizontal top 34 extending from said front wall forwardly and some distance above thecook ing surface 3 over substantially a half of the width and the whole length of the latter. The spout 33 also has a front wall 35 and the sides 35 and has its bottom opened as at 3B.

"Hot air, fumes, and products of combustion. rising from the cooking surface 3. are drawninto. the intake spout 33 and further into. the front. compartment 24.

Below. the collector plate. 26. there are arranged an insulating. chamber lll and. a flue duct, 41.: The insulating chamber 48 is formed by the back wall 1.3 and a front wall 42, abottom and the, sidewalls. 8 and 9, and it contains two. hot, air passages. 48. located at the side walls Band 9-. The passages 4:8. begin at the top 1 and termi-. nate some distance above the bottom 4.3.. Said passages are provided for the purpose of ventie lating the kitchen by drawing hot air from the. spaceabove said device. The amount, of hotair to .be drawnthrough said passages may beregulated by louvres 55 arranged at thev topthereof. Thehot. air is drawn through said passages .48 downwardly and enters the insulating chamber that the bottom whereupon it rises upwardly into the front. compartment 2|.

The flue duct 4! is provided for the, DUITDQSB of directing fumesand products of combustion from theoven 41,130 which it is connected into. the front compartment, 21., The duct 41 ,is' formed by he r t. wa l; 42.. f t in ulating chamber 411, a duct; front wall 54; and side walls L Fig 4 shows a modification of the device I; Where nthefiue uc 4i s b u ed by 2100 1,": ventional open flue in form of a pipe 52,,

Al ento a si fety da per 5.5 is proyided-in the wall 42;, connecting the flue duct; 41,: or the. pipe 52- with the insulating chamber 40;. The; safety damper 55 is of a standard type. having an adj-ustably balanced closure disk, 56 which. is. n rmal-1y p ne a how intbe Fi s- 3 .a.r:ui. .4=.v

The automatic safety damper 55. keeps an open; path for fumes and products of combustionwhe l. the forced draft is inoperative, and; partiallycloses v said path when the forced draft is; in operation depending upon the draft and the flow; of fumes and products of combustion from the oven.4.

A bypass 51 with an automatic safety damper. 58 arranged at the top thereof is providedinthe chamber 6 between the filters 29 and theback; Wall l3. The bypass 5'! is in form of a funnel: extending from the bottom of thfirchamber 6 upwardly and operatively connecting the front compartment 2| with the rear compartment, 22..

The damper 58 is of identical construction with.

whenftheforced draft is in operationso as tq,

force said hot air, fumes and products of coiribustion to pass through the filters 20.

A stack 60 is arranged over the middle of the device which stack has arranged therein an electric motor BI and a fan 62 driven thereby to draw air from the rear compartment 22 through said stack into the atmosphere.

The motor BI and the fan 6? create a forced draftin. t e device I which draws all fumes, odors, products of combustion of the gas range and the hot air around the same through the intake spout 33' and the flue duct 4| or the pipe 52 into the front. compartment 2 I and also draws warm room airwhich accumulates above the device through the hot air passages and discharges said air into the insulating chamber 40 near the bottom there,of..

Said room air cools the insulating chamber 40, which serves as insulation between the range and the wall 59 near which the latter is installed. Upon leavinathe chamberlllcsaid hot air enters the front compartment 21, whereinit. mixedwith fumes. and products of; combustion thus thinning the. latteriand making. them easier to, filter-.. The-filtered air. isdischarged intathe atmosphere ndthe, condensates arecollectedas. above. d cribed..

The. size .of.. thepassages, 4.8.. depends; upon. the

size of thegdevice twhich may take care of one.

.1;: several piec s. f, ookin equipment... It has been. determi ed'thatsin, order. o. take careof:

the. extrem heat. fumesand products of. come bustier} he. sizee he-pa sa es .8 should besuch as. Q d lireplwn ubi feet cfiai per m nuteiper. each linear foot of coo .Qquipmfilifi, and the.

duct. 01.1fm p p ust qa-p mi ute nereaeh linea.v foot Qi QQk1-.

ing equipment.

he suct qn th u h the ntakesneut fre etonly takes care of the fumes andghot, a a. 1 .1,. in fr m the,coo i g-surface},butc We airinto thesamefroni aroundth ga -ran hu keeps ing operator of the; nge n the stream.

of fresh air and out de. of said fumes and;

n-em re sir whe l hemes s The panels l2 are made convex f f, Pr v din m m in i oatsf aew l ers 2Q;

fumes and products of combustion whic not pass th-I ugh the; lower pant of hefsatt, m at msntllt. raft closes the. automati -damper The-force 58 thus fol-sing air tastesat;teammate.

open ng. nq iehz e the. predict QfcQmbastwn and fumes from the oven to pass giving a perfec.t;

a anc est ion; h: or; wi haiit; for ed. dr f forc d. dra is -neperat e than k ping af s passage to the stack 65 for fumes; escaping ea zwhe as ra e cocks. areerroneensly open and burners not 1ighted, ,thu s previentingcsace.

um e ien. fea-sss. Thev define. properiyu djusted, does not need; any attention andi'is fully, amma-tit ns a E 5;.and; fi showi another.- modified: formsof' my invention as an adaptation of saiddeuiceto. a peal; =W.0O.d:,. or .oil-p stove-6.5; Thesconstruction of the, chamber 6. .is. the; same asein. abovede-- scribed formsi and. includes: the filters 20;: the

front, compartment 2:! and thelrear compartment feet. ofair, fumes 22. It also has the by-pass 51 with the automaticdamper 58. Butthe flue duct 4] is substituted by a; horizontally disposedcollecting duct 65 which collects the products of-combustion of the stove'fifijor a number of suchstoves, if two or more are set close to each'oth'e The collecting duct is connected by a pipe 68 to the stack, not shown inthe drawings; The collectingduct is not operatively connected tothe chamber 6, as the smoke from the burnt coal, Wood or oil would soil and clog the filters 2D and the inside of said; chamber and prevent proper'concentration of oil and grease from air passing through said filters. f f Figs. '7 and 8 show another adaptation of the device to a coal, wood or oil stove Ill, where the latter has an extended flue collar H with a manual damper 12. In the latter case the chamber 6 has substantially the same construction as in the above described device I. But the insulating chamber as is omitted and the chamber 6 is closed by an inclined bottom 73 which serves as a drain trough. The portion 14 of the bottom '13 forms an inclined surface to collect grease and oil dripping from the front wall ii) and direct the same onto the bottom 73. The hot air passages 48 terminate in close proximity to said bottom.

A smoke passage 15 provided under said bottom communicates with the flue collar H. The smoke passage 15 has a partition 16 which permits smoke from the flue collar 'H to pass to the side wall 11 wherein an opening It is provided to pass smoke into a pipe 80 which is connected with a smoke stack not shown in the drawings. The passage 15 beyond said partition 16 contains a grease container 82 into which grease from the bottom 13 drips.

Fig. 9 shows a duplex ventilating device 85 as adapted for two rows of stoves 86 arranged back to back. The device 85 has a common chamber 81 having two rows of filters 20 arranged therein dividing said chamber into two front compartments B9 and a rear compartment 99. The filters 20 are held in place by the above described bracket 23 and by the trough 24 and the condensates are collected by the collector plates 26 and directed into the drains 28 wherefrom the same are discharged into the grease tank.

The device has the usual by-passes 51 and the automatic safety dampers 55, which dampers are operatively connected with the ovens by the pipes 52. The chamber 81 has a pair of passages 9| through which hot air is drawn from above the device 85. The passages 9| terminate some distance above the bottom 92 of the device. The

operation of this device is exactly the same as of those shown in Figures 1 to 4 inclusive.

Having thus described my invention, I claim: 1. The combination of a cooking stove having an oven, with a ventilating device comprising means forming a chamber located above said stove; a filter arranged in said chamber and dividing the same into front and rear compartments; an intake spout extending above said stove nd communicating with the said front compartment, said spout being adapted to draw air and fumes from the top of stove; means connecting the oven with the front compartment for directing fumes and products of combustion from said oven; said device having a passage for directing room air above said device downwardly and upwardly to the front compartment; said filter adapted to condense grease and oil from the air passing from the front compartment 6 through th fllter and into the rear. compart l merit; a collector plate adapted to collect grease and oil condensed 'by the filter and settled on the inner walls of 'the front compartmen.t;-'means for drawing air away from the rear compartment"; and an automatic safety vent which permits air and fumes to by-pass said filter when the means for drawing air are inoperative.

. 2. The combination of two cooking stoves having ovens arranged back to back with a duplex ventilating device, comprising means forming a common chamber arranged above said stoves; a plurality of filters in said chamber dividing the same into two front compartments anda rear compartment, an intake spoutextending from the lower part of the chamber toward and over the middle of said stoves, said spouts adapted to draw fumes and hot air from the tops of the cooking stoves; a flue connecting said chamber with the oven of each stove to draw fumes and products of combustion from said ovens; said device having a passage for directing room air above the device downwardly to the bottom of said device and therefrom upwardly into said front compartments, said filters being adapted to condense oil and grease from the air, fumes and products of combustion passing therethrough; means for collecting said grease and oil; and means for drawing air, fumes, and products of combustion through said filters.

3. The combination of a cooking stove having a, cooking surface and an oven with a ventilating device comprising means forming a chamber, a filter in said chamber for condensing grease and oil from the air passing therethrough; a flue duct extending from said oven toward the chamber; said duct having an automatic damper therein; a blower for drawing fumes and air from the cooking surface and the oven; said automatic damper being adapted to stay open when the blower is inoperative and to be only partially open when the blower is operating; a. stack; means forming a by-pass in the chamber, said by-pass communicating with the stack; means for keeping said by-pass closed when the blower is operating, and for keeping said by-pass open and permitting said fumes and hot air to pass into the stack when the blower is inoperative.

4. The combination of a cooking stove havin a cooking surface and an oven with a ventilating device comprising means forming a chamber; a filter in said chamber; means forming a duct extending from said oven toward said chamber; a stack; means for drawing fumes and air from said cooking surface and said oven through said filter into said stack; and means forming a bypass for said fumes and air into said stack directly when the means for drawing fumes and air are inoperative.

5. A ventilating device comprising means forming a chamber having a top, front and back walls and two sides; a filter dividing said chamber into a front and a rear compartment and adapted to condense grease and oil from the air passing therethrough; means forming an air intake arranged at the bottom of said chamber and communicating with the front compartment; a stack communicating with the rear compartment for expelling air therefrom into the atmosphere; means for forming passages opened at the top and passing through the rear compartment, the lower end of which passages communicate with the front compartment; means for drawing air from the front compartment, through the filter into the rear compartment and into the stack;

alienation, and to; be, op,ened. when vfiche last m n-- innesi: means; are in p ra v WIILIAMVAPLEDGERL REFERENCES CITED TheJo-Howingreferences are: of: record in the file ofi i this patent:

UNITED STATESPATENTS Numben 1 foe-t. 22; 19 9 -7. .sep 2911931 

